Amphibians and Reptiles from Two Localities in the Northern Andes of Colombia

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Amphibians and Reptiles from Two Localities in the Northern Andes of Colombia 13 4 203 Restrepo et al ANNOTATED LIST OF SPECIES Check List 13 (4): 203–237 https://doi.org/10.15560/13.4.203 Amphibians and reptiles from two localities in the northern Andes of Colombia Adriana Restrepo, Claudia Molina-Zuluaga, Juan P. Hurtado, Carlos M. Marín, Juan M. Daza Grupo Herpetológico de Antioquia, Instituto de Biología, Universidad de Antioquia, A.A. 1226, Medellín, Colombia. Corresponding author: Juan M. Daza, [email protected] Abstract The northern Andes are a geographically, climatically, and ecologically complex area that harbors a high number of species and presents a high level of endemism. However, the landscape of this region has been highly transformed by human activities, including agriculture, cattle grazing, urbanization, and recently, the construction of large infrastruc- ture projects. This study presents a list of amphibians and reptiles compiled from field surveys carried out between 2006 and 2016 in the protected areas surrounding 2 hydroelectric projects located on the eastern flank of the northern Cordillera Central in Colombia. The checklist is comprised of 101 species (43 amphibians and 58 reptiles), including 17 endemic to Colombia and 4 threatened species. The high species density, high representativeness of the regional biodiversity, and high level of amphibian endemism make these 2 protected areas important for conservation of the regional herpetofauna. Key words Endemism; frogs; hydroelectric dam; lizards; snakes; species richness. Academic editor: Sebastian Lotzkat | Received 3 December 2015 | Accepted 4 June 2017 | Published 28 July 2017 Citation: Restrepo A, Molina-Zuluaga C, Hurtado JP, Marín CM, Daza JM (2017) Amphibians and reptiles from two localities in the northern Andes of Colombia. Check List 13 (4): 203–237. https://doi.org/10.15560/13.4.203 Introduction the final closure of the Isthmus of Panama that allowed the biotic interchange between 2 continents, and (3) the The Andes mountain range extends for 5000 km along climatic fluctuations during the Pleistocene that lead to the western coast of South America and 3 main domains cycles of range contraction and expansion resulting in the are recognized: southern, central and northern Andes fragmentation and isolation of natural populations, with (Gregory-Wodzicki 2000). The northern Andes reach subsequent speciation and radiation events (Duellman their maximum geomorphological complexity in Colom- 1999, Kattan et al. 2004). Thus, the diversity of ecologi- bia, where 3 mountain chains (the Western, Central, and cal settings generated by this physiographic complexity Eastern cordilleras), are separated by the sedimentary has made the northern Andes one of the most biodiverse basins of the Cauca and Magdalena rivers (Kattan et al. regions on the planet with an exceptional number of 2004). Three major historical events have shaped the bio- endemic plants and vertebrates (Fjeldsa 1994, Duellman logical diversity in this region: (1) the uplift of mountain 1999, Myers et al. 2000). ranges in a complex series of orogenic processes generat- The northern Andes are also under continuous and ing new environments and causing vicariant events, (2) intense anthropogenic pressure. About 70% of the human Copyright Restrepo et al. This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. 204 Check List 13 (4) Figures 1. Study area showing the location in Colombia and the northern Cordillera Central. On the right, the two localities (Jaguas and San Carlos) are expanded and black dots represent the sampling sites. Colors represent cover type. population in Colombia is concentrated in this region and Methods agricultural activities, cattle grazing and infrastructure development (i.e. urbanization, dam construction, and Study sites. This study was conducted in the northern roads) are among the main causes of habitat loss and Andes at 2 sites above 500 m elevation in the Cordil- fragmentation (Etter and van Wyngaarden 2000, Fjeldsa lera Central in Antioquia department, Colombia (Fig. et al. 2005). On the eastern flank of the northern Cordil- 1). The Jaguas site (06°26ʹ06.0ʺ N, 075°00ʹ57.6ʺ W) lera Central, several hydroelectric projects involving dam includes a 4000 ha private protected area with habitats in constructions, roads, and power lines were developed different successional stages, within the premontane wet in the last 2 decades. As a mitigation strategy, Colom- forest life zone (bmh-PM, Holdridge 1964). The altitude bia’s environmental legislation demands that these large ranges between 1100 and 1300 m above sea level. The temperature ranges between 18 and 24 °C and the annual infrastructure projects compensate the negative impacts rainfall between 2000 and 4000 mm. The San Carlos through the implementation of effective conservation and site (06°12ʹ57.6ʺ N, 074°51ʹ21.6ʺ W) includes a private restoration plans by preserving and monitoring the biodi- protected area of 3000 ha, within the tropical moist forest versity in the surrounding areas (Minambiente 2012). As life zone (bh-T, Holdridge 1964). The altitude is between a consequence, these habitats, as virtually the only rem- 600 and 950 m above sea level. It has a mean temperature nants left, represent a last-minute opportunity to make of 24 °C and the annual rainfall ranges between 2000 and complete species checklists for the northern portion of 4000 mm. The 2 sites are under a bimodal rainfall regime the central Andes of Colombia. with 1 rainy season between March and May and 1 Based on more than a decade of field surveys, we pro- between September and November (Poveda et al. 2005). vide the species list of amphibians and reptiles found in the protected areas of 2 main hydroelectric projects located on Data collection. Between 2006 and 2016, the complete the northeastern Cordillera Central in Colombia. species inventory has been an ongoing goal as part of the Restrepo et al. | Herpetofauna of the northern Andes of Colombia 205 monitoring plan implemented by the company ISAGEN (2000) proposed R. pseudopalmatus as sister species of S.A. Amphibians and reptiles were searched for in all R. palmatus. However, Grant et al. (2006) question the possible microhabitats including diurnal and nocturnal validity of morphological characters used to distinguish sampling events during rainy, dry, and transition seasons. this species from R. palmatus and consider that both spe- In total, 49 sampling points were distributed in different cies could be conespecific given that the type locality of vegetation types. R. pseudopalmatus (Amalfi, Antioquia) lies within the Collected specimens were euthanized with 2% Roxi- known distribution of R. palmatus on the eastern slope cain®, fixed in 10% formalin solution, and preserved of the Central Cordillera. Here, we assign our samples in 70% ethanol following the protocol by Cortez et al. to R. pseudopalmatus according to Muñoz-Ortíz et al. (2006). Voucher specimens are deposited in the Museo (2015) who suggested, based on molecular information, de Herpetología Universidad de Antioquia (MHUA), in that this species could be redescribed restricting R. pseu- Medellín, Colombia (Instituto Alexander von Humboldt dopalmatus to the Central Cordillera and R. palmatus to registry # 80, since the year 2000). All procedures were the Eastern Cordillera. conducted under permit No. 112–0046 granted by the Rhinella alata (Thominot, 1884): Figure 2B Corporación Autónoma Regional CORNARE. We list the Bufo alatus Thominot 1884: 151. collected and examined specimens in Table 1 (amphib- Rhinella alata — Frost et al. 2006: 365 ians) and 2 (reptiles). All coordinates use the WGS84 Material examined. Table 1. datum. Rhinella alata is a small-sized toad with skin of Amphibian nomenclature follows Frost (2016) and dorsum bearing a mixture of warts, pustules and minute reptile nomenclature follows Uetz and Hošek (2016). We tubercles; supraorbital crests low and thick, continuous reviewed the original descriptions of the species along with preorbital crests; dorsal coloration ranging from with the MHUA reference collection to corroborate the light gray or brown to dark gray or brown, with irregular taxonomic identifications. We included in the list only black and yellowish marks (a mid-dorsal line is usu- the species having voucher specimens or photographs ally present) and coloration of ventral surfaces cream to that allow unambiguous identification of taxa. We follow yellowish-cream with irregular darker marks arranged in the species distribution provided by IUCN (2016) for diverse patterns (dos Santos et al. 2015). Populations of amphibians and Uetz and Hošek (2016) for reptiles. Rhinella margaritifera species group distributed on Mag- dalena river valley have commonly been referred to as Results R. margaritifera (see Burbano et al. 2016). Nevertheless, although R. alata is closely related to R. margaritifera Amphibians (distributed in the upper Amazon basin of Peru and From the 2 protected areas, we report 43 amphibian spe- Ecuador), this species may be easily distinguished by dif- cies representing 13 families and 25 genera (Table 3). ferences in body size (R. margaritifera being significant In the protected area of the Jaguas locality, we report 37 larger than R. alata) and the relative size of the cranial amphibian species from 11 families. The most diverse crest (larger in R. margaritifera than
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